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  1. #1
    mtbr member
    Join Date
    Jul 2004

    Shimano M985 race crank, is it possible to use 42x28?

    I am looking at the M985 XTR crank-set and would like to do a hybrid of two gearing options to get a slightly better overall range. I was thinking of getting a crank-set with 42x30 then swapping out the 30 for a 28 small ring. I have seen some notes with the 28 tooth rings where they mention that it is for use with a 40 tooth big ring. All of these rings are 88mm bolt circle diameter, so I am wondering if there really is a limitation/compatibility issue.

    Is it possible to setup an M985 XTR crank with 42x28?

  2. #2
    mtbr member
    Join Date
    Nov 2009
    Not sure but I have a xtr race 2x10 28-40 forsale if your interested just send me a message. It is on pinkbike for sale with pics and more details under the same user name

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